/* ระบบพฤติกรรมนักเรียน โรงเรียนนาบอน */
* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
    --primary: #1e5fa8;
    --primary-dark: #16497f;
    --bg: #f2f5f9;
    --card: #ffffff;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e2e8f0;
    --normal: #157f3d;
    --normal-bg: #e5f5eb;
    --watch: #9a6700;
    --watch-bg: #fdf3d7;
    --risk: #c2410c;
    --risk-bg: #ffe9dd;
    --critical: #b91c1c;
    --critical-bg: #fde5e5;
    --radius: 12px;
}
body {
    font-family: 'Sarabun', 'Segoe UI', Tahoma, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
    min-height: 100vh;
}

/* ---------- login ---------- */
.login-body { display: flex; align-items: center; justify-content: center; padding: 16px; background: linear-gradient(135deg, #1e5fa8 0%, #16497f 100%); }
.login-box { background: var(--card); border-radius: 16px; padding: 36px 32px; width: 100%; max-width: 400px; box-shadow: 0 10px 40px rgba(0,0,0,.25); text-align: center; }
.login-logo { font-size: 48px; margin-bottom: 8px; }
.login-box h1 { font-size: 22px; color: var(--primary-dark); }
.login-sub { color: var(--muted); margin: 4px 0 20px; font-size: 14px; }
.login-box form { text-align: left; }
.login-box label { display: block; font-weight: 600; margin: 12px 0 4px; font-size: 14px; }
.login-box input { width: 100%; padding: 12px 14px; border: 1px solid var(--border); border-radius: 10px; font-size: 16px; font-family: inherit; }
.login-box input:focus { outline: 2px solid var(--primary); border-color: var(--primary); }
.login-footer { margin-top: 20px; font-size: 12px; color: var(--muted); }

/* ---------- layout ---------- */
.topbar { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: #fff; padding: 14px 20px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.topbar h1 { font-size: 19px; display: flex; align-items: center; gap: 10px; }
.topbar .user-area { display: flex; align-items: center; gap: 10px; font-size: 14px; flex-wrap: wrap; }
.container { max-width: 1200px; margin: 0 auto; padding: 20px 16px 60px; }

/* ---------- summary cards ---------- */
.summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.sum-card { background: var(--card); border-radius: var(--radius); padding: 16px; border: 1px solid var(--border); cursor: pointer; transition: transform .1s, box-shadow .1s; border-left: 6px solid var(--border); }
.sum-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,.08); }
.sum-card.active { outline: 2px solid var(--primary); }
.sum-card .num { font-size: 30px; font-weight: 700; line-height: 1.2; }
.sum-card .lbl { font-size: 14px; color: var(--muted); }
.sum-card .sub { font-size: 12px; color: var(--muted); }
.sum-card.c-total { border-left-color: var(--primary); }
.sum-card.c-total .num { color: var(--primary); }
.sum-card.c-normal { border-left-color: var(--normal); }
.sum-card.c-normal .num { color: var(--normal); }
.sum-card.c-watch { border-left-color: var(--watch); }
.sum-card.c-watch .num { color: var(--watch); }
.sum-card.c-risk { border-left-color: var(--risk); }
.sum-card.c-risk .num { color: var(--risk); }
.sum-card.c-critical { border-left-color: var(--critical); }
.sum-card.c-critical .num { color: var(--critical); }

/* ---------- toolbar ---------- */
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; align-items: center; }
.toolbar input[type=text], .toolbar select { padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; font-size: 16px; font-family: inherit; background: #fff; }
.toolbar input[type=text] { flex: 1 1 220px; min-width: 180px; }
.toolbar .spacer { flex: 1; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 6px; padding: 10px 16px; border: none; border-radius: 10px; font-size: 15px; font-family: inherit; font-weight: 600; cursor: pointer; min-height: 44px; transition: filter .1s; text-decoration: none; }
.btn:hover { filter: brightness(1.08); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-success { background: var(--normal); color: #fff; }
.btn-danger { background: var(--critical); color: #fff; }
.btn-outline { background: #fff; color: var(--text); border: 1px solid var(--border); }
.btn-sm { padding: 6px 10px; font-size: 13px; min-height: 34px; border-radius: 8px; }
.btn-block { width: 100%; justify-content: center; margin-top: 18px; }
.btn-ghost-light { background: rgba(255,255,255,.15); color: #fff; }

/* ---------- table ---------- */
.table-wrap { background: var(--card); border-radius: var(--radius); border: 1px solid var(--border); overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th { background: #f8fafc; text-align: left; font-size: 13px; color: var(--muted); padding: 10px 12px; border-bottom: 1px solid var(--border); white-space: nowrap; position: sticky; top: 0; }
td { padding: 10px 12px; border-bottom: 1px solid #f1f5f9; font-size: 15px; vertical-align: middle; }
tr:hover td { background: #f8fafc; }
td.num, th.num { text-align: center; }
.score-val { font-weight: 700; font-size: 16px; }
.score-neg { color: var(--critical); }
.score-pos { color: var(--normal); }

.badge { display: inline-block; padding: 3px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; white-space: nowrap; }
.badge-normal { background: var(--normal-bg); color: var(--normal); }
.badge-watch { background: var(--watch-bg); color: var(--watch); }
.badge-risk { background: var(--risk-bg); color: var(--risk); }
.badge-critical { background: var(--critical-bg); color: var(--critical); }

.row-actions { display: flex; gap: 6px; flex-wrap: nowrap; }

/* ---------- modal ---------- */
.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.55); display: none; align-items: flex-start; justify-content: center; padding: 24px 12px; z-index: 100; overflow-y: auto; overscroll-behavior: contain; }
.modal-overlay.show { display: flex; }
.modal { background: #fff; border-radius: 16px; width: 100%; max-width: 560px; box-shadow: 0 20px 60px rgba(0,0,0,.3); animation: pop .15s ease-out; }
.modal.modal-lg { max-width: 860px; }
@keyframes pop { from { transform: scale(.96); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.modal-head { padding: 16px 20px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.modal-head h2 { font-size: 18px; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--muted); line-height: 1; padding: 4px 8px; }
.modal-body { padding: 20px; }
.modal-foot { padding: 14px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-grid .full { grid-column: 1 / -1; }
.fld label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.fld input, .fld select, .fld textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; font-size: 16px; font-family: inherit; background: #fff; }
.fld input:focus, .fld select:focus, .fld textarea:focus { outline: 2px solid var(--primary); border-color: var(--primary); }
.fld textarea { resize: vertical; min-height: 70px; }

.type-toggle { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.type-toggle button { padding: 12px; border-radius: 10px; border: 2px solid var(--border); background: #fff; font-family: inherit; font-size: 16px; font-weight: 700; cursor: pointer; min-height: 48px; }
.type-toggle button.sel-deduct { border-color: var(--critical); background: var(--critical-bg); color: var(--critical); }
.type-toggle button.sel-add { border-color: var(--normal); background: var(--normal-bg); color: var(--normal); }

/* ---------- alerts / misc ---------- */
.alert { padding: 10px 14px; border-radius: 10px; margin-bottom: 12px; font-size: 14px; }
.alert-error { background: var(--critical-bg); color: var(--critical); }
.alert-info { background: #e0ecfb; color: var(--primary-dark); }
.empty { text-align: center; padding: 40px 16px; color: var(--muted); }
.footer { text-align: center; color: var(--muted); font-size: 13px; padding: 20px; }
.muted { color: var(--muted); font-size: 13px; }

/* history list */
.hist-item { display: flex; justify-content: space-between; gap: 10px; padding: 10px 0; border-bottom: 1px solid #f1f5f9; align-items: flex-start; }
.hist-item:last-child { border-bottom: none; }
.hist-pts { font-weight: 700; white-space: nowrap; }
.hist-pts.add { color: var(--normal); }
.hist-pts.deduct { color: var(--critical); }

/* import */
.drop-zone { border: 2px dashed var(--border); border-radius: 12px; padding: 26px; text-align: center; color: var(--muted); cursor: pointer; }
.drop-zone:hover { border-color: var(--primary); color: var(--primary); }
.import-preview { max-height: 320px; overflow: auto; border: 1px solid var(--border); border-radius: 10px; margin-top: 12px; }
.import-preview table { min-width: 620px; }

/* toast */
#toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: #1f2937; color: #fff; padding: 12px 22px; border-radius: 999px; font-size: 15px; opacity: 0; pointer-events: none; transition: opacity .2s; z-index: 200; max-width: 92vw; text-align: center; }
#toast.show { opacity: 1; }

/* checkbox col */
.chk { width: 18px; height: 18px; cursor: pointer; }

@media (max-width: 640px) {
    .topbar h1 { font-size: 16px; }
    .form-grid { grid-template-columns: 1fr; }
    td, th { padding: 8px; font-size: 14px; }
    .sum-card .num { font-size: 24px; }
}